Converting a number of minutes to a difftime
On Thu, 12 May 2005, Martin C. Martin wrote:
I have a variable "m" that contains the number of minutes that something lasted, e.g. m <- 139 I'd like to convert it to a difftime, so I can add it to the POSIXct start time. But as.difftime seems to want a character string, with at most two characters for the minutes. All other conversion functions seem to take strings as well. What am I missing?
as.difftime() is quite limited. You need to get your hands dirty:
structure(m, units = "mins", class = "difftime")
will do the job.
Alternatively, Sys.time + (m*60) works.
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595